Identification and control of a flexible rotor supported on active magnetic bearings

Flexible Rotor ◽

Modeling And Control ◽

Elastic Modes ◽

This paper presents a new modeling method and a control system design procedure for a flexible rotor with many elastic modes using active magnetic bearings. The purpose of our research is to let the rotor rotate passing over the 1st and the 2nd critical speeds caused by flexible modes. To achieve this, it is necessary to control motion and vibration of the flexible rotor simultaneously. The new modeling method named as Extended Reduced Order Physical Model is presented to express its motion and vibration uniformly. By using transfer function of flexible rotor-Active Magnetic Bearings system, we designed a Local Jerk Feedback Control system and conducted stability discrimination with root locus. In order to evaluate this modeling and control method, levitation experimentation is conducted.

Volume 1: 20th Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C ◽

Modeling, Motion and Vibration Control for Flexible Rotor Supported by Active Magnetic Bearings

10.1115/detc2005-85195 ◽

2005 ◽

Cited By ~ 3

Author(s):

Yuichi Nakajima ◽

Takahito Sagane ◽

Hiroshi Tajima ◽

Toru Watanabe ◽

Kazuto Seto

Keyword(s):

High Speed ◽

Magnetic Bearings ◽

Flexible Rotor ◽

Bending Vibration ◽

Modeling And Control ◽

Control Approach ◽

Flexible Rotors ◽

Pass Through ◽

This paper proposes a new modeling technique and control system design for flexible rotors using active magnetic bearings (AMB) to pass through many critical speeds and fulfill high-speed rotation. To achieve this purpose, it is necessary to control not only motion but also many modes of bending vibration. For the purpose, an extended reduced order physical model that is able to express simultaneously the motion and bending vibration of the flexible rotor, is proposed. Furthermore, a new controller combined PID with LQ control is adapted to control the flexible rotor. Effectiveness of the proposed modeling and control approach for the flexible rotor is verified through simulations and experiments.

Modeling, design and control of a flexible rotor supported by active magnetic bearings

10th International Conference on Vibrations in Rotating Machinery ◽

10.1533/9780857094537.6.419 ◽

2012 ◽

pp. 419-426 ◽

Cited By ~ 1

Author(s):

G. Štimac ◽

S. Braut ◽

R. Žigulić ◽

A. Skoblar

Keyword(s):

Magnetic Bearings ◽

Flexible Rotor ◽

Volume 5: 19th Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C ◽

A New Modeling Technique and Control System Design of a Flexible Rotor Supported by Active Magnetic Bearings for Motion and Vibration Control

10.1115/detc2003/vib-48411 ◽

2003 ◽

Cited By ~ 2

Author(s):

Mitsuhiro Ichihara ◽

Hideo Shida ◽

Takahito Sagane ◽

Hiroshi Tajima ◽

Muneharu Saigou ◽

...

Keyword(s):

Control System ◽

Vibration Control ◽

System Design ◽

Physical Model ◽

Magnetic Bearings ◽

Control System Design ◽

Flexible Rotor ◽

Reduced Order ◽

This paper proposed a new modeling technique and control system design of a flexible rotor using active magnetic bearings (AMB) for motion and vibration control. The purpose of the research was to pass through a critical speed and achieve high-speed rotation. To achieve this, it is necessary to control both vibration and motion. Even though reduced order physical model [1] that we used before is available technique in expressing vibration, this technique cannot express motion. Thus we propose an extended reduced order physical model [2] that can simultaneously express motion and vibration. Further, by using the model we apply the design of a new controller that combined proportional integral derivative (PID) with linear quadratic (LQ) control to a flexible rotor. The procedure we propose is verified by simulations as being effective for a flexible rotor.